Preheat oven to 180ºC. Place the potato on a large baking tray. Drizzle over half the oil. Season with salt and pepper. Toss to coat. Roast for 25 minutes. Add the onion to the tray. Roast for a further 30 minutes or until potato and onion are tender and golden. Set aside for 10 minutes to cool.
Place the potato, onion, celery, garlic, parsley and oregano in a large bowl. Season with salt and pepper. Drizzle over the remaining oil. Toss until well combined.
Recipe courtesy of www.taste.com.au
Serving size 6